34 lines
669 B
Coq
34 lines
669 B
Coq
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`define ADD 4'd0
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`define LESS 4'd1
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`define EQ 4'd2
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`define OR 4'd3
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`define AND 4'd4
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`define NOT 4'd5
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`define MUL 4'd6
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`define DIV 4'd7
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`define MOD 4'd8
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module ALU(opcode, op_a, op_b, result);
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parameter N = 32;
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input [3:0] opcode;
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input [N-1:0] op_a, op_b;
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output [N-1:0] result;
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reg [N-1:0] result;
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always @* begin
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case (opcode)
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`ADD: result = op_a + op_b;
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`LESS: result = op_a < op_b;
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`EQ: result = op_a == op_b;
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`OR: result = op_a | op_b;
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`AND: result = op_a & op_b;
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`NOT: result = !op_a;
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`MUL: result = op_a * op_b;
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`DIV: result = op_a / op_b;
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`MOD: result = op_a % op_b;
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default: result = 0;
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endcase
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end
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endmodule
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